#include<iostream>

using namespace std;

struct ListNode {
    int val;
    ListNode* next;
    ListNode() : val(0), next(nullptr) {}
    ListNode(int x) : val(x), next(nullptr) {}
    ListNode(int x, ListNode* next) : val(x), next(next) {}
};

class Solution {
public:
    ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
        ListNode* newhead = new ListNode(0);
        ListNode* cur1 = l1, * cur2 = l2, * next = newhead;

        int t = 0;
        while (cur1 || cur2 || t)
        {
            if (cur1)
            {
                t += cur1->val;
                cur1 = cur1->next;
            }

            if (cur2)
            {
                t += cur2->val;
                cur2 = cur2->next;
            }
            next->next = new ListNode(t % 10);
            next = next->next;
            t /= 10;
        }
        next = newhead->next;
        delete newhead;

        return next;
    }
};

int main()
{
    return 0;
}